// Copyright (c) 2020 Huawei Technologies Co., Ltd
// Copyright (c) 2019, Facebook CORPORATION. 
// All rights reserved.
//
// Licensed under the BSD 3-Clause License  (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://opensource.org/licenses/BSD-3-Clause
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include <c10/npu/NPUException.h>
#include <third_party/acl/inc/acl/acl.h>
#include <deque>
#include <mutex>
namespace c10 {
namespace npu {
class TORCH_NPU_API NPUEventManager {
public:
  static NPUEventManager& GetInstance();
  aclError QueryAndDestroyEvent();
  aclError LazyDestroy(aclrtEvent npu_event);
  aclError ClearEvent();
  ~NPUEventManager(){}

private:
  std::mutex event_queue_mutex_;
  NPUEventManager();
  std::deque<aclrtEvent> npu_events_;
};
} // namespace NPU
} // namespace c10